We’re not talking the obvious, if often impressive, stuff like Google Docs and Dropbox. These are the sites that save you hard drive space and clutter, and help you get by without having to shell out for software for just this one thing.

Aram Bartholl's public art installations are a mash-up of the real and digital worlds. "Space and cyberspace mingle and mangle one another" in his work, as sci-fi author Bruce Sterling says in the introduction to this retrospective of Bartholl's entertaining techno-art. You've likely seen his art via a Tumblr meme or buzzfed pass-around link—the USB thumb drives embedded in a wall, the ginormous red Google Map location marker placed in a plaza.